CAJ | 학술논문

在实验室规模的湍动循环流化床试验装置上,以高温预热空气和水蒸气为气化剂进行了加压煤气化特性试验,考察了湍动循环流化床气化的可行性及其操作参数,并研究了气化炉压力对煤气化行为的影响.研究结果表明:压力能改善气化炉床内流化质量,提高了碳转化率,从而影响煤气热值.气化压力由常压提高到0.3 Mpa时,煤气热值提高15%,碳转化率由57.52%增加到76.76%,干煤气产率和冷煤气效率也随压力增大而小幅增大.对于特定的循环流化床气化工艺,气化压力存在最佳气化效果区域,在本实验条件下,0.3～0.4 Mpa时气化效果最佳.
재실험실규모적단동순배류화상시험장치상,이고온예열공기화수증기위기화제진행료가압매기화특성시험,고찰료단동순배류화상기화적가행성급기조작삼수,병연구료기화로압력대매기화행위적영향.연구결과표명:압력능개선기화로상내류화질량,제고료탄전화솔,종이영향매기열치.기화압력유상압제고도0.3 Mpa시,매기열치제고15%,탄전화솔유57.52%증가도76.76%,간매기산솔화랭매기효솔야수압력증대이소폭증대.대우특정적순배류화상기화공예,기화압력존재최가기화효과구역,재본실험조건하,0.3～0.4 Mpa시기화효과최가.
Using high temperature preheated air and steam as gasifying agent,coal gasification experiments are performed in a pressurized turbulent circulating fluidized bed (CFB) gasification pilot plant in order to investigate the pressurized gasification process and estimate its potential.The test facility as well as its operation behavior is described.Furthermore,the parameter pressure is investigated regarding to its influence on the producer gas composition.The study results show that the gasification quality is improved at elevated pressure because of the better fluidization in the reactor.Coal gasification at a higher pressure shows advantages in lower heat value and carbon conversion.The gas heating value is increased by 15% when the gasifier pressure increases from 0.1 MPa to 0.3 MPa.Increasing the gasifier pressure would increase the carbon conversion from 57.52% to 76.76%.The dry gas yield and the efficiency of cold gas increase a little with the increase of the gasifier pressure.There exists an optimal gasifier pressure for a certain CFB coal gasification process.For the test condition,a pressure of 0.3 to 0.4 MPa produces optimal gasification effect.